<style>
    .d1{background:LightSkyBlue;}
    .d2{background:LightSalmon;}
    .d3{background:PaleTurquoise;}
    .d4{background:LightPink;}
    .d5{background:PaleGreen;}

    .container {
        font-size: 40px;
        width: 100%;
        background: LightGray;
        display: grid;
        grid-template-columns: 100px 100px 100px;
        /* 请在本行以下添加你的代码 */
        grid-template-rows: 50px 50px;

        /* 请在本行以上添加你的代码 */
    }
</style>

<div class="container">
    <div class="d1">1</div>
    <div class="d2">2</div>
    <div class="d3">3</div>
    <div class="d4">4</div>
    <div class="d5">5</div>
</div>